Ventilation

Question 1

Inspiration

Answer 1

External intercostal muscles and diaphragm muscles contract this causes the ribcage to move upwards and out and the diaphragm to flatten increase in the volume of the thorax as volume of the thorax increases the pressure decreases this causes air to flow into lungs this is an active process it requires energy

Question 2

Expiration

Answer 2

External intercostal and diaphragm muscles relax. The ribcage moves down and in and diaphragm becomes curved the Thorax volume decreases causing air pressure to increase. It is a passive process but can be forced e.g. Blowing out a birthday cake this requires ATP

Question 3

Tidal volume

Answer 3

Volume of air each breath

Question 4

Vital capacity

Answer 4

Max vol breathed in and out

Question 5

Breathing rate

Answer 5

How many breaths are taken

Question 6

Oxygen uptake

Answer 6

Rate organisms use up oxygen